SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 ND

2011 ND

2011 ND is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.265 AU once every 3.41 yr.

Amor Observations: 68
Orbital Period · P
3.41 yr
v(q)
33.4 km/s
v(Q)
11.7 km/s
Diameter · ≈
0.13 km
TJ
3.45
Eccentricity · e
0.4807

Orbit and dynamics

The path is an ellipse reaching 1.176 AU from the Sun at perihelion and 3.354 AU at aphelion, a radial span of 2.178 AU.

Applying Kepler's third law to a = 2.265 AU gives an orbital period of 3.41 yr, or about 1,245 days.

The high eccentricity (0.481) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 5.06° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.4 km/s at perihelion and falls to 11.7 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 22.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.13 km.

Observation record and orbit quality

The current orbit solution is based on 68 observations and has a weighted RMS residual of 0.3256 arcseconds.

Condition code U = 8 signals a poorly constrained orbit, so its future path should be treated as provisional.

About these computed values

Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Orbital Parameters

Semi-Major Axis
2.265 AU
Eccentricity
0.4807
Perihelion
1.176 AU
Aphelion
3.353786 AU
Inclination
5.06°
Orbital Period
— yr
Epoch
2455747.5
Mean Anomaly
355.18°

Orbit diagram

The Sun sits at the focus (orange). Earth's orbit is the grey circle at 1 AU. The red dot marks the object's position at the catalog epoch.

3D orbit (interactive)

Drag to rotate; scroll or pinch to zoom. The Sun is at the focus (orange), Earth's orbit is the grey ring at 1 AU, and the red dot marks the object's current position.

Close approaches

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
22.2

Orbit Quality

RMS
0.32555
Condition
8
Orbit ID
—
Data source: NASA JPL Small-Body Database . Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

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